include/lttng/abi.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng/abi.h
   4  *
   5  * LTTng ABI header
   6  *
   7  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  */
   9
  10 #ifndef _LTTNG_ABI_H
  11 #define _LTTNG_ABI_H
  12
  13 #include <linux/fs.h>
  14 #include <linux/types.h>
  15
  16 /*
  17  * Major/minor version of ABI exposed to lttng tools. Major number
  18  * should be increased when an incompatible ABI change is done.
  19  */
  20 #define LTTNG_MODULES_ABI_MAJOR_VERSION         2
  21 #define LTTNG_MODULES_ABI_MINOR_VERSION         6
  22
  23 #define LTTNG_KERNEL_SYM_NAME_LEN       256
  24 #define LTTNG_KERNEL_SESSION_NAME_LEN   256
  25 #define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN  26
  26
  27 enum lttng_kernel_instrumentation {
  28         LTTNG_KERNEL_TRACEPOINT = 0,
  29         LTTNG_KERNEL_KPROBE     = 1,
  30         LTTNG_KERNEL_FUNCTION   = 2,
  31         LTTNG_KERNEL_KRETPROBE  = 3,
  32         LTTNG_KERNEL_NOOP       = 4,    /* not hooked */
  33         LTTNG_KERNEL_SYSCALL    = 5,
  34         LTTNG_KERNEL_UPROBE     = 6,
  35 };
  36
  37 /*
  38  * LTTng consumer mode
  39  */
  40 enum lttng_kernel_output {
  41         LTTNG_KERNEL_SPLICE     = 0,
  42         LTTNG_KERNEL_MMAP       = 1,
  43 };
  44
  45 /*
  46  * LTTng DebugFS ABI structures.
  47  */
  48 #define LTTNG_KERNEL_CHANNEL_PADDING    LTTNG_KERNEL_SYM_NAME_LEN + 32
  49 struct lttng_kernel_channel {
  50         uint64_t subbuf_size;                   /* in bytes */
  51         uint64_t num_subbuf;
  52         unsigned int switch_timer_interval;     /* usecs */
  53         unsigned int read_timer_interval;       /* usecs */
  54         uint32_t output;                        /* enum lttng_kernel_output (splice, mmap) */
  55         int overwrite;                          /* 1: overwrite, 0: discard */
  56         char padding[LTTNG_KERNEL_CHANNEL_PADDING];
  57 } __attribute__((packed));
  58
  59 struct lttng_kernel_kretprobe {
  60         uint64_t addr;
  61
  62         uint64_t offset;
  63         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  64 } __attribute__((packed));
  65
  66 /*
  67  * Either addr is used, or symbol_name and offset.
  68  */
  69 struct lttng_kernel_kprobe {
  70         uint64_t addr;
  71
  72         uint64_t offset;
  73         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  74 } __attribute__((packed));
  75
  76 struct lttng_kernel_function_tracer {
  77         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  78 } __attribute__((packed));
  79
  80 struct lttng_kernel_uprobe {
  81         int fd;
  82 } __attribute__((packed));
  83
  84 struct lttng_kernel_event_callsite_uprobe {
  85         uint64_t offset;
  86 } __attribute__((packed));
  87
  88 struct lttng_kernel_event_callsite {
  89         union {
  90                 struct lttng_kernel_event_callsite_uprobe uprobe;
  91         } u;
  92 } __attribute__((packed));
  93
  94 enum lttng_kernel_syscall_entryexit {
  95         LTTNG_KERNEL_SYSCALL_ENTRYEXIT  = 0,
  96         LTTNG_KERNEL_SYSCALL_ENTRY      = 1,
  97         LTTNG_KERNEL_SYSCALL_EXIT       = 2,
  98 };
  99
 100 enum lttng_kernel_syscall_abi {
 101         LTTNG_KERNEL_SYSCALL_ABI_ALL = 0,
 102         LTTNG_KERNEL_SYSCALL_ABI_NATIVE = 1,
 103         LTTNG_KERNEL_SYSCALL_ABI_COMPAT = 2,
 104 };
 105
 106 enum lttng_kernel_syscall_match {
 107         LTTNG_KERNEL_SYSCALL_MATCH_NAME = 0,
 108         LTTNG_KERNEL_SYSCALL_MATCH_NR = 1,              /* Not implemented. */
 109 };
 110
 111 struct lttng_kernel_syscall {
 112         uint8_t entryexit;      /* enum lttng_kernel_syscall_entryexit */
 113         uint8_t abi;            /* enum lttng_kernel_syscall_abi */
 114         uint8_t match;          /* enum lttng_kernel_syscall_match */
 115         uint8_t padding;
 116         uint32_t nr;            /* For LTTNG_SYSCALL_MATCH_NR */
 117 } __attribute__((packed));
 118
 119 /*
 120  * For syscall tracing, name = "*" means "enable all".
 121  */
 122 #define LTTNG_KERNEL_EVENT_PADDING1     8
 123 #define LTTNG_KERNEL_EVENT_PADDING2     LTTNG_KERNEL_SYM_NAME_LEN + 32
 124 struct lttng_kernel_event {
 125         char name[LTTNG_KERNEL_SYM_NAME_LEN];   /* event name */
 126         uint32_t instrumentation;               /* enum lttng_kernel_instrumentation */
 127         uint64_t token;                         /* User-provided token */
 128         char padding[LTTNG_KERNEL_EVENT_PADDING1];
 129
 130         /* Per instrumentation type configuration */
 131         union {
 132                 struct lttng_kernel_kretprobe kretprobe;
 133                 struct lttng_kernel_kprobe kprobe;
 134                 struct lttng_kernel_function_tracer ftrace;
 135                 struct lttng_kernel_uprobe uprobe;
 136                 struct lttng_kernel_syscall syscall;
 137                 char padding[LTTNG_KERNEL_EVENT_PADDING2];
 138         } u;
 139 } __attribute__((packed));
 140
 141 #define LTTNG_KERNEL_EVENT_NOTIFIER_PADDING     32
 142 struct lttng_kernel_event_notifier {
 143         struct lttng_kernel_event event;
 144         uint64_t error_counter_index;
 145
 146         char padding[LTTNG_KERNEL_EVENT_NOTIFIER_PADDING];
 147 } __attribute__((packed));
 148
 149 #define LTTNG_KERNEL_COUNTER_DIMENSION_MAX      4
 150
 151 enum lttng_kernel_counter_arithmetic {
 152         LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR = 0,
 153 };
 154
 155 enum lttng_kernel_counter_bitness {
 156         LTTNG_KERNEL_COUNTER_BITNESS_32 = 0,
 157         LTTNG_KERNEL_COUNTER_BITNESS_64 = 1,
 158 };
 159
 160 struct lttng_kernel_counter_dimension {
 161         uint64_t size;
 162         uint64_t underflow_index;
 163         uint64_t overflow_index;
 164         uint8_t has_underflow;
 165         uint8_t has_overflow;
 166 } __attribute__((packed));
 167
 168 #define LTTNG_KERNEL_COUNTER_CONF_PADDING1      67
 169 struct lttng_kernel_counter_conf {
 170         uint32_t arithmetic;    /* enum lttng_kernel_counter_arithmetic */
 171         uint32_t bitness;       /* enum lttng_kernel_counter_bitness */
 172         uint32_t number_dimensions;
 173         int64_t global_sum_step;
 174         struct lttng_kernel_counter_dimension dimensions[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
 175         uint8_t coalesce_hits;
 176         char padding[LTTNG_KERNEL_COUNTER_CONF_PADDING1];
 177 } __attribute__((packed));
 178
 179 struct lttng_kernel_counter_index {
 180         uint32_t number_dimensions;
 181         uint64_t dimension_indexes[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
 182 } __attribute__((packed));
 183
 184 struct lttng_kernel_counter_value {
 185         int64_t value;
 186         uint8_t underflow;
 187         uint8_t overflow;
 188 } __attribute__((packed));
 189
 190 #define LTTNG_KERNEL_COUNTER_READ_PADDING 32
 191 struct lttng_kernel_counter_read {
 192         struct lttng_kernel_counter_index index;
 193         int32_t cpu;    /* -1 for global counter, >= 0 for specific cpu. */
 194         struct lttng_kernel_counter_value value;        /* output */
 195         char padding[LTTNG_KERNEL_COUNTER_READ_PADDING];
 196 } __attribute__((packed));
 197
 198 #define LTTNG_KERNEL_COUNTER_AGGREGATE_PADDING 32
 199 struct lttng_kernel_counter_aggregate {
 200         struct lttng_kernel_counter_index index;
 201         struct lttng_kernel_counter_value value;        /* output */
 202         char padding[LTTNG_KERNEL_COUNTER_AGGREGATE_PADDING];
 203 } __attribute__((packed));
 204
 205 #define LTTNG_KERNEL_COUNTER_CLEAR_PADDING 32
 206 struct lttng_kernel_counter_clear {
 207         struct lttng_kernel_counter_index index;
 208         char padding[LTTNG_KERNEL_COUNTER_CLEAR_PADDING];
 209 } __attribute__((packed));
 210
 211 #define LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
 212 struct lttng_kernel_event_notifier_notification {
 213         uint64_t token;
 214         uint16_t capture_buf_size;
 215         char padding[LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING];
 216 } __attribute__((packed));
 217
 218 struct lttng_kernel_tracer_version {
 219         uint32_t major;
 220         uint32_t minor;
 221         uint32_t patchlevel;
 222 } __attribute__((packed));
 223
 224 struct lttng_kernel_tracer_abi_version {
 225         uint32_t major;
 226         uint32_t minor;
 227 } __attribute__((packed));
 228
 229 struct lttng_kernel_session_name {
 230         char name[LTTNG_KERNEL_SESSION_NAME_LEN];
 231 } __attribute__((packed));
 232
 233 struct lttng_kernel_session_creation_time {
 234         char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
 235 } __attribute__((packed));
 236
 237 enum lttng_kernel_calibrate_type {
 238         LTTNG_KERNEL_CALIBRATE_KRETPROBE,
 239 };
 240
 241 struct lttng_kernel_calibrate {
 242         uint32_t type;  /* enum lttng_kernel_calibrate_type (input) */
 243 } __attribute__((packed));
 244
 245 struct lttng_kernel_syscall_mask {
 246         uint32_t len;   /* in bits */
 247         char mask[];
 248 } __attribute__((packed));
 249
 250 enum lttng_kernel_context_type {
 251         LTTNG_KERNEL_CONTEXT_PID                = 0,
 252         LTTNG_KERNEL_CONTEXT_PERF_COUNTER       = 1,
 253         LTTNG_KERNEL_CONTEXT_PROCNAME           = 2,
 254         LTTNG_KERNEL_CONTEXT_PRIO               = 3,
 255         LTTNG_KERNEL_CONTEXT_NICE               = 4,
 256         LTTNG_KERNEL_CONTEXT_VPID               = 5,
 257         LTTNG_KERNEL_CONTEXT_TID                = 6,
 258         LTTNG_KERNEL_CONTEXT_VTID               = 7,
 259         LTTNG_KERNEL_CONTEXT_PPID               = 8,
 260         LTTNG_KERNEL_CONTEXT_VPPID              = 9,
 261         LTTNG_KERNEL_CONTEXT_HOSTNAME           = 10,
 262         LTTNG_KERNEL_CONTEXT_CPU_ID             = 11,
 263         LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE      = 12,
 264         LTTNG_KERNEL_CONTEXT_PREEMPTIBLE        = 13,
 265         LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE    = 14,
 266         LTTNG_KERNEL_CONTEXT_MIGRATABLE         = 15,
 267         LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL   = 16,
 268         LTTNG_KERNEL_CONTEXT_CALLSTACK_USER     = 17,
 269         LTTNG_KERNEL_CONTEXT_CGROUP_NS          = 18,
 270         LTTNG_KERNEL_CONTEXT_IPC_NS             = 19,
 271         LTTNG_KERNEL_CONTEXT_MNT_NS             = 20,
 272         LTTNG_KERNEL_CONTEXT_NET_NS             = 21,
 273         LTTNG_KERNEL_CONTEXT_PID_NS             = 22,
 274         LTTNG_KERNEL_CONTEXT_USER_NS            = 23,
 275         LTTNG_KERNEL_CONTEXT_UTS_NS             = 24,
 276         LTTNG_KERNEL_CONTEXT_UID                = 25,
 277         LTTNG_KERNEL_CONTEXT_EUID               = 26,
 278         LTTNG_KERNEL_CONTEXT_SUID               = 27,
 279         LTTNG_KERNEL_CONTEXT_GID                = 28,
 280         LTTNG_KERNEL_CONTEXT_EGID               = 29,
 281         LTTNG_KERNEL_CONTEXT_SGID               = 30,
 282         LTTNG_KERNEL_CONTEXT_VUID               = 31,
 283         LTTNG_KERNEL_CONTEXT_VEUID              = 32,
 284         LTTNG_KERNEL_CONTEXT_VSUID              = 33,
 285         LTTNG_KERNEL_CONTEXT_VGID               = 34,
 286         LTTNG_KERNEL_CONTEXT_VEGID              = 35,
 287         LTTNG_KERNEL_CONTEXT_VSGID              = 36,
 288         LTTNG_KERNEL_CONTEXT_TIME_NS            = 37,
 289 };
 290
 291 struct lttng_kernel_perf_counter_ctx {
 292         uint32_t type;
 293         uint64_t config;
 294         char name[LTTNG_KERNEL_SYM_NAME_LEN];
 295 } __attribute__((packed));
 296
 297 #define LTTNG_KERNEL_CONTEXT_PADDING1   16
 298 #define LTTNG_KERNEL_CONTEXT_PADDING2   LTTNG_KERNEL_SYM_NAME_LEN + 32
 299 struct lttng_kernel_context {
 300         uint32_t ctx;   /*enum lttng_kernel_context_type */
 301         char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
 302
 303         union {
 304                 struct lttng_kernel_perf_counter_ctx perf_counter;
 305                 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
 306         } u;
 307 } __attribute__((packed));
 308
 309 #define LTTNG_KERNEL_FILTER_BYTECODE_MAX_LEN            65536
 310 struct lttng_kernel_filter_bytecode {
 311         uint32_t len;
 312         uint32_t reloc_offset;
 313         uint64_t seqnum;
 314         char data[0];
 315 } __attribute__((packed));
 316
 317 #define LTTNG_KERNEL_CAPTURE_BYTECODE_MAX_LEN           65536
 318 struct lttng_kernel_capture_bytecode {
 319         uint32_t len;
 320         uint32_t reloc_offset;
 321         uint64_t seqnum;
 322         char data[0];
 323 } __attribute__((packed));
 324
 325 enum lttng_kernel_tracker_type {
 326         LTTNG_KERNEL_TRACKER_UNKNOWN            = -1,
 327
 328         LTTNG_KERNEL_TRACKER_PID                = 0,
 329         LTTNG_KERNEL_TRACKER_VPID               = 1,
 330         LTTNG_KERNEL_TRACKER_UID                = 2,
 331         LTTNG_KERNEL_TRACKER_VUID               = 3,
 332         LTTNG_KERNEL_TRACKER_GID                = 4,
 333         LTTNG_KERNEL_TRACKER_VGID               = 5,
 334 };
 335
 336 struct lttng_kernel_tracker_args {
 337         uint32_t type;  /* enum lttng_kernel_tracker_type */
 338         int32_t id;
 339 };
 340
 341 /* LTTng file descriptor ioctl */
 342 /* lttng/abi-old.h reserve 0x40, 0x41, 0x42, 0x43, and 0x44. */
 343 #define LTTNG_KERNEL_SESSION                    _IO(0xF6, 0x45)
 344 #define LTTNG_KERNEL_TRACER_VERSION             \
 345         _IOR(0xF6, 0x46, struct lttng_kernel_tracer_version)
 346 #define LTTNG_KERNEL_TRACEPOINT_LIST            _IO(0xF6, 0x47)
 347 #define LTTNG_KERNEL_WAIT_QUIESCENT             _IO(0xF6, 0x48)
 348 #define LTTNG_KERNEL_CALIBRATE                  \
 349         _IOWR(0xF6, 0x49, struct lttng_kernel_calibrate)
 350 #define LTTNG_KERNEL_SYSCALL_LIST               _IO(0xF6, 0x4A)
 351 #define LTTNG_KERNEL_TRACER_ABI_VERSION         \
 352         _IOR(0xF6, 0x4B, struct lttng_kernel_tracer_abi_version)
 353 #define LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_CREATE    _IO(0xF6, 0x4C)
 354
 355 /* Session FD ioctl */
 356 /* lttng/abi-old.h reserve 0x50, 0x51, 0x52, and 0x53. */
 357 #define LTTNG_KERNEL_METADATA                   \
 358         _IOW(0xF6, 0x54, struct lttng_kernel_channel)
 359 #define LTTNG_KERNEL_CHANNEL                    \
 360         _IOW(0xF6, 0x55, struct lttng_kernel_channel)
 361 #define LTTNG_KERNEL_SESSION_START              _IO(0xF6, 0x56)
 362 #define LTTNG_KERNEL_SESSION_STOP               _IO(0xF6, 0x57)
 363 #define LTTNG_KERNEL_SESSION_TRACK_PID          \
 364         _IOR(0xF6, 0x58, int32_t)
 365 #define LTTNG_KERNEL_SESSION_UNTRACK_PID        \
 366         _IOR(0xF6, 0x59, int32_t)
 367
 368 /*
 369  * ioctl 0x58 and 0x59 are duplicated here. It works, since _IOR vs _IO
 370  * are generating two different ioctl numbers, but this was not done on
 371  * purpose. We should generally try to avoid those duplications.
 372  */
 373 #define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS  _IO(0xF6, 0x58)
 374 #define LTTNG_KERNEL_SESSION_METADATA_REGEN     _IO(0xF6, 0x59)
 375
 376 /* lttng/abi-old.h reserve 0x5A and 0x5B. */
 377 #define LTTNG_KERNEL_SESSION_STATEDUMP          _IO(0xF6, 0x5C)
 378 #define LTTNG_KERNEL_SESSION_SET_NAME           \
 379         _IOR(0xF6, 0x5D, struct lttng_kernel_session_name)
 380 #define LTTNG_KERNEL_SESSION_SET_CREATION_TIME          \
 381         _IOR(0xF6, 0x5E, struct lttng_kernel_session_creation_time)
 382
 383 /* Channel FD ioctl */
 384 /* lttng/abi-old.h reserve 0x60 and 0x61. */
 385 #define LTTNG_KERNEL_STREAM                     _IO(0xF6, 0x62)
 386 #define LTTNG_KERNEL_EVENT                      \
 387         _IOW(0xF6, 0x63, struct lttng_kernel_event)
 388 #define LTTNG_KERNEL_SYSCALL_MASK               \
 389         _IOWR(0xF6, 0x64, struct lttng_kernel_syscall_mask)
 390
 391 /* Event and Channel FD ioctl */
 392 /* lttng/abi-old.h reserve 0x70. */
 393 #define LTTNG_KERNEL_CONTEXT                    \
 394         _IOW(0xF6, 0x71, struct lttng_kernel_context)
 395
 396 /* Event, Event notifier, Channel, Counter and Session ioctl */
 397 /* lttng/abi-old.h reserve 0x80 and 0x81. */
 398 #define LTTNG_KERNEL_ENABLE                     _IO(0xF6, 0x82)
 399 #define LTTNG_KERNEL_DISABLE                    _IO(0xF6, 0x83)
 400
 401 /* Trigger group and session ioctl */
 402 #define LTTNG_KERNEL_COUNTER \
 403         _IOW(0xF6, 0x84, struct lttng_kernel_counter_conf)
 404
 405 /* Event and Event notifier FD ioctl */
 406 #define LTTNG_KERNEL_FILTER                     _IO(0xF6, 0x90)
 407 #define LTTNG_KERNEL_ADD_CALLSITE               _IO(0xF6, 0x91)
 408
 409 /* Session FD ioctl (continued) */
 410 #define LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS   \
 411         _IOR(0xF6, 0xA0, struct lttng_kernel_tracker_args)
 412 #define LTTNG_KERNEL_SESSION_TRACK_ID           \
 413         _IOR(0xF6, 0xA1, struct lttng_kernel_tracker_args)
 414 #define LTTNG_KERNEL_SESSION_UNTRACK_ID         \
 415         _IOR(0xF6, 0xA2, struct lttng_kernel_tracker_args)
 416
 417 /* Event notifier group file descriptor ioctl */
 418 #define LTTNG_KERNEL_EVENT_NOTIFIER_CREATE \
 419         _IOW(0xF6, 0xB0, struct lttng_kernel_event_notifier)
 420 #define LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD \
 421         _IO(0xF6, 0xB1)
 422
 423 /* Event notifier file descriptor ioctl */
 424 #define LTTNG_KERNEL_CAPTURE                    _IO(0xF6, 0xB8)
 425
 426 /* Counter file descriptor ioctl */
 427 #define LTTNG_KERNEL_COUNTER_READ \
 428         _IOWR(0xF6, 0xC0, struct lttng_kernel_counter_read)
 429 #define LTTNG_KERNEL_COUNTER_AGGREGATE \
 430         _IOWR(0xF6, 0xC1, struct lttng_kernel_counter_aggregate)
 431 #define LTTNG_KERNEL_COUNTER_CLEAR \
 432         _IOW(0xF6, 0xC2, struct lttng_kernel_counter_clear)
 433
 434
 435 /*
 436  * LTTng-specific ioctls for the lib ringbuffer.
 437  *
 438  * Operations applying to the current sub-buffer need to occur between
 439  * a get/put or get_next/put_next ioctl pair.
 440  */
 441
 442 /* returns the timestamp begin of the current sub-buffer */
 443 #define LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN   _IOR(0xF6, 0x20, uint64_t)
 444 /* returns the timestamp end of the current sub-buffer */
 445 #define LTTNG_RING_BUFFER_GET_TIMESTAMP_END     _IOR(0xF6, 0x21, uint64_t)
 446 /* returns the number of events discarded of the current sub-buffer */
 447 #define LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED  _IOR(0xF6, 0x22, uint64_t)
 448 /* returns the packet payload size of the current sub-buffer */
 449 #define LTTNG_RING_BUFFER_GET_CONTENT_SIZE      _IOR(0xF6, 0x23, uint64_t)
 450 /* returns the packet size of the current sub-buffer*/
 451 #define LTTNG_RING_BUFFER_GET_PACKET_SIZE       _IOR(0xF6, 0x24, uint64_t)
 452 /* returns the stream id (invariant for the stream) */
 453 #define LTTNG_RING_BUFFER_GET_STREAM_ID         _IOR(0xF6, 0x25, uint64_t)
 454 /* returns the current timestamp as perceived from the tracer */
 455 #define LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP _IOR(0xF6, 0x26, uint64_t)
 456 /* returns the packet sequence number of the current sub-buffer */
 457 #define LTTNG_RING_BUFFER_GET_SEQ_NUM           _IOR(0xF6, 0x27, uint64_t)
 458 /* returns the stream instance id (invariant for the stream) */
 459 #define LTTNG_RING_BUFFER_INSTANCE_ID           _IOR(0xF6, 0x28, uint64_t)
 460
 461 #ifdef CONFIG_COMPAT
 462 /* returns the timestamp begin of the current sub-buffer */
 463 #define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN \
 464         LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN
 465 /* returns the timestamp end of the current sub-buffer */
 466 #define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_END \
 467         LTTNG_RING_BUFFER_GET_TIMESTAMP_END
 468 /* returns the number of events discarded of the current sub-buffer */
 469 #define LTTNG_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED \
 470         LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED
 471 /* returns the packet payload size of the current sub-buffer */
 472 #define LTTNG_RING_BUFFER_COMPAT_GET_CONTENT_SIZE \
 473         LTTNG_RING_BUFFER_GET_CONTENT_SIZE
 474 /* returns the packet size of the current sub-buffer */
 475 #define LTTNG_RING_BUFFER_COMPAT_GET_PACKET_SIZE \
 476         LTTNG_RING_BUFFER_GET_PACKET_SIZE
 477 /* returns the stream id (invariant for the stream) */
 478 #define LTTNG_RING_BUFFER_COMPAT_GET_STREAM_ID \
 479         LTTNG_RING_BUFFER_GET_STREAM_ID
 480 /* returns the current timestamp as perceived from the tracer */
 481 #define LTTNG_RING_BUFFER_COMPAT_GET_CURRENT_TIMESTAMP \
 482         LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP
 483 /* returns the packet sequence number of the current sub-buffer */
 484 #define LTTNG_RING_BUFFER_COMPAT_GET_SEQ_NUM    \
 485         LTTNG_RING_BUFFER_GET_SEQ_NUM
 486 /* returns the stream instance id (invariant for the stream) */
 487 #define LTTNG_RING_BUFFER_COMPAT_INSTANCE_ID    \
 488         LTTNG_RING_BUFFER_INSTANCE_ID
 489 #endif /* CONFIG_COMPAT */
 490
 491 #endif /* _LTTNG_ABI_H */